Southern California -- this just in

Police detain suspect in May Day drum attack on officer

Los Angeles police said they have detained a man believed to have struck a female officer on the head with a snare drum during Tuesday's May Day rally, law enforcement sources said.

The suspect was not immediately identified and was being questioned. Police stressed that they still want anyone who witnessed the incident to come forward.

The incident was captured on video and uploaded to YouTube, under the title "Cheap Shot on Cop." A man dressed in a black T-shirt and black hoodie is seen approaching the helmeted female officer, circling around behind her and striking her on the back of the head with the item before running off.

Police officials said the officer was hospitalized as a precaution but was not seriously injured. The impact of the blow jerked her head forward and dented her helmet, officials said.

Police are continuing to search for several masked suspects who attacked officers with a large wooden pallet in a separate incident.

The downtown incident unfolded when officers issued a call for help at 4th and Hill streets about 4:20 p.m. Tuesday when demonstrators, many from the Occupy movement, began circling officers and chanting, "We are the 99%." The crowd swelled as officers arrived by bicycle, motorcycle and on foot to quell the brewing confrontation.

At least 14 arrests were reported Tuesday, including three in North Hollywood, one downtown involving a false bomb threat against a bank, and 10 pre-designated detentions at Los Angeles International Airport.

The incidents were in contrast to the overall tone of the protests, which were largely nonviolent.